A major part of the power consumption in the low-wattage reciprocating compressors, used for household refrigeration units, is associated with the motor. A variable speed compressor as opposed to a single speed compressor is known to provide energy savings due to its ability to match the load demand from the pump more closely to the power delivered by the pump. The current article presents an o...

INTRODUCTION TO AIR BLAST MEASUREMENTS An explosion in air is a process by which a rapid release of energy generates a pressure wave of finite amplitude. The energy source can be anything that generates a violent reaction when initiated. This includes: chemical or nuclear materials, gases (high pressure gasstorage vessels, steam boilers), or electricity (spark gap, rapid vaporization of a metal...

The linear stability of finite-amplitude interfacial waves in a two-layer fluid is investigated for superharmonic disturbances on the basis of the Euler set of equations. In the previous study (J. Fluid Mech. 2006, vol.547, p.175), the author proved analytically for surface waves that the superharmonic instability first occurs when the wave energy density becomes stationary as a function of wav...

We study the existence of traveling waves in a one-dimensional network of integrateand-fire neurons with finite support coupling. We show that when the reset after spiking is sufficiently low, the interspike intervals (ISIs) for a traveling wave with an explicit first wave front can be computed. Further, we analytically derive a self-consistency equation that generates an explicit dispersion re...

Effective finite transport speeds are crucial to many situations of great industrial and medical importance. Traditional finite speed transport models are critically reviewed and new models are introduced. It is concluded that realistic finite speed models with constant coefficients cannot be local in space and are either local in phase-space or non local in space; models with time-dependent co...

Fast reduction of blood water volume due to ultra-filtration via hemodialysis machine and critical threshold of blood water volume can result in clinical complications such as hypotension. When blood water volume reduces during hemodialysis process, the concentration of blood forming elements will increase. One of the methods for the monitoring of the concentration changes is ultrasonic speed m...

of the wave speed Tuncay Aktosun Department of Mathematics, Southern Methodist University. Dallas, Texas 75275 Martin Klaus Department of Mathematics, Virginia Polytechnic Institute and State University, Blackburg, Virginia 24061 Cornelis van der Mee Department of Physics and Astronomy, Free University, Amsterdam, The Netherlands (Received 17 September 1991; accepted for publication 2 1 Novembe...

Values of release wave speed in shock-compressed polycrystalline alumina and aluminum (2024) have been measured to 400 and 260 kbar, respectively. These values, as well as previous data for aluminum and iron, have been compared with fourth-order finite strain extrapolations of the longitudinal sound speed V o. For alumina in the pressure range 200-300 kbar and for a iron and • iron the observed...

Seismic wave modelling algorithms used for calculating the seismic response of a given earth model, require large computational resources in terms of speed and memory. In this paper we describe the PVM (Parallel Virtual Machine) implementation of these algorithms in a distributed computing environment. Both the acoustic and elastic wave modelling equations are formulated as a first order hyperb...

The physical background of singular memory models and in particular the Cole–Cole model is discussed. Three models of anisotropic linear viscoelasticity with frequency-dependent stiffness coefficients are considered. The models are constructed in such a way that anisotropic properties are separated from anelastic effects. Two of these models represent finite-speed wave propagation with singular...